Digital Signing and Digital Encryption Support

Digitally signed emails are supported with Hosted Exchange Email Professional accounts in Outlook or Outlook Web Access.

To sign or encrypt email digitally, you will need a Digital Certificate, such as those provided by Comodo. Go to their site and follow the "Get it Free Now" link.

Please Note: In order to digitally encrypt an email to any recipient, both you and the recipient must have a valid digital certificate.
Also, you must save the recipient in your Contacts along with a copy of
the recipient's public key. Therefore, before you can exchange
encrypted emails with the recipient, you may need to first exchange digitally signed emails.

How To Digitally Encrypt Email

To sign up for a Digital Certificate from Comodo, you can follow these steps:

Please note, this will install the certificate only on one computer.
If you access your Business Exchange service from multiple computers and
want to be able to use the certificate from multiple computers, you'll
need to install the certificate on each computer. For instructions on
how to export your certificate to a file, and to import it on a
different computer, click here.

If you are using Outlook 2010 to send an receive email, you can follow these steps:

In order to digitally encrypt an email to any recipient, both you and the recipient must have a valid certificate.
Also, you must save the recipient in your Contacts with the recipient's
public key. Therefore, before you can exchange encrypted emails with
the recipient, you may need to first exchange digitally signed emails.
Alternately, if the recipient is a member of the Global Address List for
your organization, the user can publish their certificate to the GAL
using Outlook 2003/2007 (using the MAPI Protocol) and you'll be able to
exchange encrypted emails without exchanging signed emails.

Then when you are composing a message in Outlook 2003/2007,
simply select the Digital Encryption button to Digitally Encrypt your
email.

In order to Digitally Encrypt an email sent using Outlook Web Access, you will need to match the following requirements:

Your Secure Email Certificate must first be installed on the computer you are using the OWA from.

You must first save the recipients Contact card with their
public key to the Exchange server using Outlook 2003/2007 (using the
MAPI Protocol).

Windows Vista users must run Internet Explorer as an
Administrator (by right clicking on the icon and selecting "Run as
Administrator"), or disable the UAC.